I'm looking at insulating my sheds flat roof. I've already bought some 18mm and 11mm OSB3 and 100mm Celotex insulation as it's going to be a warm roof. Everything will also be mechanically fixed and finished with an EPDM sheet.
I'll be fitting the 18mm OSB3 first and I need a vapour control layer. It's a lot cheaper to go for a VPC that isn't self adhesive and browsing forums suggest I don't need to glue a VPC down if it's being mechanically fixed. Is this correct? I'm presuming if it is correct, I just need to seal the joins of the VPC with jointing tape?
Could anyone confirm that this is correct please?
Thank you
Just thought, the Celotex boards have foil on both sides, some information is saying I don't need vapour control due to the foil, is that right?
I'll be fitting the 18mm OSB3 first and I need a vapour control layer. It's a lot cheaper to go for a VPC that isn't self adhesive and browsing forums suggest I don't need to glue a VPC down if it's being mechanically fixed. Is this correct? I'm presuming if it is correct, I just need to seal the joins of the VPC with jointing tape?
Could anyone confirm that this is correct please?
Thank you
Just thought, the Celotex boards have foil on both sides, some information is saying I don't need vapour control due to the foil, is that right?
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